Density of demersal fishes (MARE data)
A figure showing the abundance of near-bottom dwelling fishes observed from a remotely operated vehicle from 2005 to 2014. Figure credit: MARE.
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Marine Applied Research and Exploration (MARE) data on abundance of demersal fishes along seafloor transects. Fish are counted using remotely operated vehicle (ROV) visual surveys of mid-depth (20 to 80 meters) rock and subtidal soft bottom in CINMS. Fish density was averaged across all monitoring sites, including sites located inside and outside of marine reserves and conservation areas, to examine course-scale trends. From 2005—2009, fish greater in length than 10 centimeters averaged 110 total fish per kilometer of surveyed transect. In 2014, average total fish per kilometer was 279, an increase of 250 percent. At a finer scale, fish density may be responding differently inside and outside of some marine protected areas (MPAs) in CINMS. For more information, consult Figure App.F.13.18 in the CINMS 2016 Condition Report.
A figure showing the abundance of near-bottom dwelling fishes (lingcod, sheephead, gopher rockfish, copper rockfish, and vermillion rockfish), observed from a remotely operated vehicle from 2005 to 2014. Figure credit: MARE.
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Marine Applied Research and Exploration (MARE) data along seafloor transects on abundance of five species of demersal fish, lingcod, sheephead, gopher rockfish, copper rockfish, and vermillion rockfish. Fish density was averaged across all monitoring sites, including sites located inside and outside of marine reserves and conservation areas, to examine course-scale trends. From 2005–2009, the total counts for these five species combined annually averaged 15 total fish per kilometer of surveyed transect. In 2014–2015, average counts per transect rose to 38 and 44 fish, respectively. At a finer scale, fish density may be responding differently inside and outside of some marine protected areas (MPAs) in CINMS. For more information, consult Figure App.F.13.19 in the CINMS 2016 Condition Report.Demersal fishes recent trends (NMFS hook & line survey data)
A table displaying the common and scientific names of species used to identify trends in fishing effort (with one type of fishing, known as fixed gear fishing) in the Southern California Bight from 2009 to 2016. Data source: NMFS NWFSC; Table credit: NOAA.
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Box plots for annual size frequency distributions of black abalone (Haliotis cracherodii) at each island. Blue lines represent mean sizes of H. cracherodii at each island pooled across and sites. Red lines represent the cumulative mean. For more information, consult Figure App.F.13.2 in the CINMS 2016 Condition Report.
A map showing the location of annual Southern California Shelf Rockfish Hook and Line Surveys in the Southern California Bight. Data source: NMFS NWFSC; Map credit: M. Cajandig/NOAA.
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Location of Southern California Shelf Rockfish Hook and Line Surveys. Annual surveys for reef-associated fish have occurred since 2004 in September and October using 75 hooks per site at depths ranging from 37 to 227 meters. Catch per unit effort (CPUE) per year was calculated for three spatial scales: CINMS included sites within the Channel Islands National Marine Sanctuary boundary (n = 26); CINMS region included sites inside the red box (n = 55); and Southern California Bight included all sites in the sampling program (n = 121). For more information, consult Figure App.F.13.20 in the CINMS 2016 Condition Report.Demersal fishes recent trends (NMFS trawl survey data)
A table displaying the common and scientific names of species used to identify trends in fishing effort (with one type of fishing, known as trawl fishing) in the Southern California Bight from 2009 to 2016. Data source: NMFS NWFSC; Table credit: NOAA.
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(left) Mean number of owl limpets (Lottia gigantea) at each island from 2000–2014. Blue lines represent mean number at each island pooled across fixed plots and error bars were constructed using one standard error from the mean. (right) Box plots for annual size frequency distributions of owl limpets at each island. Black lines represent mean sizes at each island pooled across fixed plots and sites. Red lines represent the cumulative mean. For more information, consult Figure App.F.13.3 in the CINMS 2016 Condition Report.
A map showing the locations of West Coast Groundfish Bottom Trawl surveys in the Southern California Bight and around point conception from ~2003 to 2014. Data source: NMFS NWFSC; Map credit: M. Cajandig/NOAA.